Amazon's trade-in program, which was previously only for a few items like books, video games, and DVDs, now includes electronics as well. If you have an old cellphone, camera, or other gadget that you aren't using anymore, you can send it off to Amazon and they'll credit your account (which, frankly, is almost as good as cash). They'll even pay the shipping fees for you. Head on over to their trade-in page to see if your gadgets are eligible (or to buy some discounted, pre-owned gadgets yourself), and hit the link to read more. [Amazon via Mashable]